RFR (M): 7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path

[Vladimir Kozlov]

But it was in webrev, so it should added (hg add) already.

Vladimir

Christian Thalinger wrote:
> I submitted a job for the push and it failed because I forgot to add the one new file to the changeset:
> 
> http://cr.openjdk.java.net/~twisti/7200949/src/share/vm/ci/ciMethodType.hpp.html
> 
> -- Chris
> 
> On Sep 28, 2012, at 3:54 PM, Vladimir Kozlov <vladimir.kozlov at oracle.com> wrote:
> 
>> Looks good.
>>
>> Vladimir
>>
>> Christian Thalinger wrote:
>>> On Sep 27, 2012, at 5:24 PM, John Rose <john.r.rose at oracle.com> wrote:
>>>> On Sep 27, 2012, at 4:34 PM, Christian Thalinger wrote:
>>>>
>>>>> http://cr.openjdk.java.net/~twisti/7200949
>>>>>
>>>>> 7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path
>>>>> Reviewed-by:
>>>> It looks good.
>>>>
>>>> (Having all the references to the jli.MethodType objects makes me wonder if we should have a JVM-internal analog MethodType, to represent resolved signatures.  I suppose what we have is reasonably economical.)
>>>>
>>>> I'm not fully comfortable with the handshake between Rewriter and CPCache (last diff hunk in cpCache.cpp).  Ideally, if you were to redefine _indy_appendix_offset=1 and _indy_method_type_offset=0 it would either Just Work (tm) or throw an assert.  It's not clear that this is the case here.
>>> The problem is the interpreter:  it uses f1 to read the appendix.  So the appendix has to be at offset 0 and other data after that.
>>> I can either:
>>> a) add the offset to the index in the interpreter (then it's fool-proof) or
>>> b) add an assert to TemplateTable::prepare_invoke:
>>> +     assert(ConstantPoolCacheEntry::_indy_resolved_references_appendix_offset == 0, "index points to 0");
>>> I did the latter, made rewriter and cpCache change more generic and updated the webrev.
>>> -- Chris
>>>> Maybe this code would help in rewriter.cpp:
>>>>
>>>> int ref_index = appendix_index - _indy_appendix_offset;
>>>> assert(ref_index == method_type_index - _indy_method_type_offset, "consistent offsets");
>>>> ... use ref_index in sequel ...
>>>>
>>>> And something similar in cpCache.cpp, using a neutral ref_index value.
>>>>
>>>> — John
>